Semiconductor UPW
Ultra-high-purity specifications with trace boron and heavy-metal control, supplying stable water to semiconductor processes.
HP-PipingCEDITOC-UVFinal UF
Est. 1981 · Taipei · 40+ years of UPW engineering
Water engineered to
Water engineered to
its theoretical limit
Since 1981, Yeson has planned, built and maintained pure-water systems end to end. From pharmaceutical-grade DI to semiconductor UPW, we start at 18.2 MΩ·cm and deliver complete systems built to run around the clock.
18.2 MΩ·cm
Resistivity
at 25 °C
< 1 ppb
TOC
Total organic carbon
< 1 ppt
Heavy Metals
Metal ions
20 nm
Particle
Final UF rating
01 / About Yeson
Four decades,
one discipline
Yeson was founded in Taipei in 1981 and has concentrated on one thing ever since: the complete planning, installation and operation of pure-water treatment systems. More than forty years of accumulated engineering has made us a trusted partner to semiconductor, chemical, pharmaceutical, hospital and general industrial customers.
We do not simply supply equipment. We take responsibility for the whole chain — source-water assessment, process design, piping installation, commissioning and long-term service. That is why customers trust us with process water that can never stop.
40+Years
3Locations
24/7Continuous
02 / Core Expertise
Six fields of water engineering
From ppt-level semiconductor ultrapure water to PIC/S-compliant pharmaceutical water and plant-wide recycling — every system is configured to the source water and the process it feeds.
Semiconductor UPW
Pharmaceutical DI
Built to EU PIC/S requirements, with hot-water sanitisation supported across the entire system.
BPE PipingHSROSUS316LSanitization
Industrial Clean Water
RO-based systems delivering continuous, stable output for high-volume plant demand.
SWRO2B3TUPVC-PipingClean PVC
Wastewater Treatment
Efficient industrial wastewater treatment to compliant discharge, supporting environmental regulation.
LamellaChemicals
Water Recycling
Raising plant-wide reuse rates to cut water cost, meet sustainability commitments and satisfy ESG standards.
UFRONF
Food & Beverage
Strict hygienic standards with multi-stage filtration and sterilisation for food-safe water.
3A PipingSUS316
03 / Flagship System
Semiconductor-grade ultrapure water
Configured to the source water and the process it serves. From pre-treatment to 20 nm final ultrafiltration, carried throughout in semiconductor-grade PVDF / PFA piping with seamless fusion welds.
01
Pre-treatmentPre-treatment02
Reverse Osmosis2-Pass RO03
CEDIElectrodeionization04
UV Photolysis185 nm TOC05
MBP PolisherMixed-Bed06
Final UF20 nm Final UF
UPW specification
- Resistivity≥ 18.2 MΩ·cm @ 25°C
- Total organic carbon< 1 ppb
- Heavy metal ions< 1 ppt
- Particle20 nm rated
- Capacity12 m³/h (12 CMH)
- PipingPVDF / PFA
- Supply24 h continuous
04 / Track Record
Delivered to the most demanding lines
Semiconductor, optoelectronics, pharmaceutical and automotive electronics — each system verified on site and proven in continuous service.
Semiconductor
Top-3 semiconductor equipment maker
18.2 MΩ·cm UPW with particles below 50 nm and metal ions under 10 ppt, accepted on first verification.
Read case
Pharmaceutical
EU PIC/S pharmaceutical plant
85 °C hot-water sanitisation throughout; bacteria counts held at 0 pcs/mL for three to six months.
Read case
LED / Optoelectronics
Global top-5 LED manufacturer
18 CMH at under 10 μS/cm, holding quality through severe swings in municipal source water.
Read case05 / Engineering Capability
Why customers choose Yeson
Single-source delivery
Source assessment, process design, fabrication, piping, commissioning and long-term service — all under one contract.
Semiconductor-grade piping
High-purity PVDF / PFA with seamless fusion welding; SUS316L to BPE standard with orbital welding on pharmaceutical projects.
Online water monitoring
TOC, SiO₂, particle, dissolved oxygen and resistivity measured online, with alarms that protect the production line.
Full validation package
DQ / IQ / OQ documentation prepared to PIC/S requirements for regulated facilities.
Start a conversation
Tell us your source water and process demand
Send us your source-water analysis, target quality and required capacity — we will reply with a recommended treatment train and an outline plan.